| Integrated blower for cooling device -> Monitor Keywords |
|
|
  Integrated blower for cooling deviceUSPTO Application #: 20060006745Title: Integrated blower for cooling device Abstract: An integrated blower for cooling device comprises an electric drive with at least one set of a flat stator and a magnetized rotor, a casing with an inlet and an outlet, and radial impeller. The flat stator integrated with the casing thus the flat stator serves as at least a part of the casing, and the magnetized rotor integrated with the radial impeller. The flat stator comprises circumferential arrayed coils with magnetic axes coincide with a plane of the flat stator. The radial impeller comprises blades attached to a backplate and a shroud, and circumferential arrayed magnetic means thus serve as the magnetized rotor. The magnetic means placed and magnetized along the plane of the flat stator thus magnetic axes of the coils and the magnetic means located at one plane substantially. (end of abstract) Agent: Edward Lopatinsky - San Diego, CA, US Inventors: Edward Lopatinsky, Lev Fedoseyev USPTO Applicaton #: 20060006745 - Class: 31006700R (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20060006745. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATIONS [0001] The present application claims the benefit of priority of U.S. Provisional Patent Application No. 60/586,128, filed Jul. 7, 2004 for Edward Lopatinsky at al. the entire content of which is incorporated herein by reference. FIELD OF THE INVENTION [0002] The present invention relates generally to radial type impeller blowers for cooling of electronic devices. More particularly, the present invention relates to relative thin blowers. The present invention is particularly, but not exclusively, useful for cooling systems for regulating the temperature of electronic components of blade servers. BACKGROUND OF THE INVENTION [0003] The regulation of the temperature due to heat generated inside the housing of an electronic device is an important consideration during the design of an electronic device. Cooling is important because if left unchecked, heat can cause electronic devices to malfunction during use or lead to premature device failure. As improvements in processor size and speed occur, the amount of heat generated by the larger and faster processors also increases. Additionally, improved processors require larger power supplies and auxiliary components that generate increased amounts of heat and require improved systems for heat removal. [0004] Another factor that aggravates the need for improved heat removal cooling systems is the trend towards making computing devices such as blade server smaller and especially thinner. The trend toward smaller and thinner electronic devices having larger, faster processors renders the traditional heat removal cooling systems inadequate for several reasons. [0005] In order to enhance the cooling capacity of a cooling device, an electrically powered blower is often mounted within or on top of a heatsink of the cooling device. In operation, the blower forces air to pass over fins of the heatsink, thus, cooling the heatsink by enhancing the heat transfer from the fins into the ambient air. [0006] There are known devices of this type, for example, U.S. Pat. No. 6,688,379 "Heat Dissipation Device with High Efficiency". The device described in this U.S. patent comprises a radial blower that produces a flow passing by heat exchanging channels of the heatsink. The radial blower comprises conventional hub electric drive spaced at a flowing part inside of a radial impeller thus restrains the air flow and therefore decrease the total amount of air passing through the heatsink. By this reason, the thermal efficiency of this heat dissipation device is insufficient. [0007] Due to modern requirements for cooling devices, especially in respect to a combination of the thermal efficiency and an available space, flat electric drives are often used in radial blowers for cooling of electronic components. There are such devices describe in U.S. Pat. No. 6,664,673 "Cooler for Electronic Devices" and No. 6,700,781 "Heat-Dissipating Module for Removing Heat Generated from Heat-Generating Device". Also, an invention described in U.S. Pat. No. 6,698,505 "Cooler for electronic device" discloses a crossflow blower with a radial impeller. All above mentioned inventions comprises a flat stator plate made as circuit board and a magnetized rotor fixed to a radial impeller of the blower. The flat stator and the magnetized rotor are located in two different parallel planes and separated by an air gap. [0008] However, such arrangement cause a vibration of the flat stator and magnetized rotor due to a rise of oscillation forces in a direction perpendicular to the planes of the flat stator and the magnetized rotor. These forces determine by an interaction between magnetic poles of the stator and rotor. In one's turn the vibration generates an increasing sound level thus contradicts with modern requirements for cooling devices. [0009] On the other hand mentioned vibration cause an energy losses thus decrease the motor efficiency of the electric drive and, correspondingly, a blower efficiency. [0010] It would be desirable to provide integrated blower for cooling device that would overcome these problems associated with increased sound level and decreased blower efficiency. SUMMARY OF THE INVENTION [0011] Accordingly, it is an object of the present invention to provide an integrated blower for electronic device, which is capable of significantly improving of blower performances such as decreased sound level and increased blower efficiency. [0012] In order to achieve this object, the integrated blower for cooling device comprises an electric drive with at least one set of a flat stator and a magnetized rotor, a casing with an inlet and an outlet, and radial impeller. The flat stator being integrated with the casing thus the flat stator serving as at least a part of the casing, and the magnetized rotor being integrated with the radial impeller. The flat stator comprising circumferential arrayed coils with magnetic axis being coincide with a plane of the flat stator. The radial impeller comprising blades being attached to a backplate and a shroud, and circumferential arrayed magnetic means thus serving as the magnetized rotor. The magnetic means being placed and magnetized along the plane of the flat stator thus magnetic axes of the coils and the magnetic means being located at one plane substantially. [0013] The magnetic means may surrounded by the coils through a radial gap. There is another variant when the coils may surrounded by the magnetic means through a radial gap. The ratio of a diameter of the radial gap in respect to a thickness of the flat stator is at least 25. [0014] There are some variants of mutual magnetization of the flat stator and the magnetic means. First, the magnetic means may magnetized in radial direction and the magnetic axis of the coils are oriented in radial direction too. Second, the magnetic means nay magnetized in tangential direction and the magnetic axes of the coils are oriented in tangential direction too. And, there is another variant, when the magnetic means are magnetized in radial direction and the coils are oriented in tangential direction and the flat stator further comprises circumferential arrayed cores with poles teeth which are oriented in radial direction. [0015] There are some options for magnetic means. The magnetic means may made as at least a part of the backplate of the impeller, may made as at least a part of the shroud of the impeller or may be made as at least a part of the blades of the impeller. [0016] There are two options for blower type. First, axis of the radial impeller is coincided with an axis of the inlet and perpendicular in respect to an axis of the outlet, so gas flows through the inlet in axial direction, the radial impeller and the outlet in a series way thus the blower being a centrifugal type blower. And second, the axis of the radial impeller is perpendicular in respect to axes of the inlet and the outlet, so gas flows through the inlet in radial direction, the radial impeller and the outlet in a series way thus said blower being a crossflow type blower. [0017] The flat stator may further comprises additional circumferential arrayed coils with magnetic axes being coincide with a plane of the flat stator, the additional circumferential arrayed coils are surrounded by the magnetic means through an inner radial gap. [0018] According to a variant of design when the magnetic means made as at least a part of the backplate of the impeller, the electric drive may further comprises additional flat stator and magnetic means, the additional flat stator located at a plane of the shroud and the additional magnetic means made as a part of the shroud. [0019] The foregoing and other objectives, features and advantages of the invention will be more readily understood upon consideration of the following detailed description of the invention, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Continue reading... Full patent description for Integrated blower for cooling device Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Integrated blower for cooling device patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Integrated blower for cooling device or other areas of interest. ### Previous Patent Application: Brushless motor Next Patent Application: Brushless motor Industry Class: Electrical generator or motor structure ### FreshPatents.com Support Thank you for viewing the Integrated blower for cooling device patent info. IP-related news and info Results in 7.63891 seconds Other interesting Feshpatents.com categories: Electronics: Semiconductor , Audio , Illumination , Connectors , Crypto , |
||
